Finding the Fourth Proportional to 123,760.79, 170,790.06 and 67,172.17

Step by Step Solution

1. Step 1: Write the proportion equation
   123,760.79 : 170,790.06 = 67,172.17 : x
2. Step 2: Convert to fraction form
   123,760.79/170,790.06 = 67,172.17/x
3. Step 3: Cross multiply
   123,760.79x = 170,790.06 × 67,172.17
4. Step 4: Simplify right side
   123,760.79x = 11,472,338,944.63
5. Step 5: Solve for x
   x = 11,472,338,944.63/123,760.79
6. Step 6: Final answer
   x = 92,697.69